:root{
  --c1:#5b6cff; --c2:#8a5cff; --bg:#f5f6fb; --card:#fff;
  --text:#1f2330; --sub:#7a8194; --line:#e7e9f2; --ok:#27c08a; --warn:#ff8a3d;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased}
a{color:var(--c1);text-decoration:none}
.btn{display:inline-flex;align-items:center;gap:6px;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;border:none;border-radius:10px;padding:10px 18px;font-size:14px;cursor:pointer;font-weight:600;transition:.15s}
.btn:hover{filter:brightness(1.06);transform:translateY(-1px)}
.btn.ghost{background:#eef0fb;color:var(--c1)}
.btn.line{border:1px solid var(--line);background:#fff;color:var(--text)}
.grad{background:linear-gradient(135deg,var(--c1),var(--c2));-webkit-background-clip:text;background-clip:text;color:transparent}
.container{max-width:1100px;margin:0 auto;padding:0 20px}

/* ===== 顶部导航 ===== */
.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 0}
.logo{font-size:22px;font-weight:800;letter-spacing:.5px}
.logo .g{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;margin-right:8px;font-weight:800}

/* ===== 落地页 Hero ===== */
.hero{padding:60px 0 30px;text-align:center}
.hero h1{font-size:42px;font-weight:800;margin-bottom:14px}
.hero p{color:var(--sub);font-size:17px;max-width:620px;margin:0 auto 26px}
.hero .acts{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.shots{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:40px 0}
.shot{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 8px 30px rgba(91,108,255,.08)}
.shot .prev{height:200px;background:linear-gradient(135deg,#eef0ff,#f3ecff);display:grid;place-items:center;color:var(--c1);font-weight:700;font-size:15px}
.shot h3{font-size:16px;padding:14px 16px 4px}
.shot p{color:var(--sub);font-size:13px;padding:0 16px 16px}
.feat{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:30px 0}
.feat .f{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}
.feat .f b{display:block;margin-bottom:6px}
.feat .f span{color:var(--sub);font-size:13px}
footer{padding:30px 0;text-align:center;color:var(--sub);font-size:13px;border-top:1px solid var(--line);margin-top:30px}

/* ===== 网盘应用页 ===== */
.appbar{display:flex;align-items:center;gap:12px;padding:14px 0;border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
.appbar .grow{flex:1}
.appbar .usertag{background:#eef0fb;color:var(--c1);font-size:13px;font-weight:600;padding:6px 12px;border-radius:20px}
.appbody{display:grid;grid-template-columns:200px 1fr;gap:20px;margin-top:20px}
.side{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px;height:fit-content}
.side a{display:block;padding:10px 12px;border-radius:9px;color:var(--text);font-size:14px;margin-bottom:4px}
.side a.active,.side a:hover{background:#eef0fb;color:var(--c1)}
.toolbar{display:flex;gap:10px;align-items:center;margin-bottom:16px}
.toolbar .grow{flex:1}
.search{width:240px;padding:9px 12px;border:1px solid var(--line);border-radius:9px;font-size:14px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:14px}
.file{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;cursor:default;transition:.15s}
.file:hover{border-color:var(--c1);box-shadow:0 6px 20px rgba(91,108,255,.12)}
.file .ic{font-size:30px}
.file .nm{font-size:14px;margin:8px 0 4px;word-break:break-all}
.file .meta{font-size:12px;color:var(--sub)}
.file .row{display:flex;gap:8px;margin-top:10px}
.file .row .btn{padding:6px 10px;font-size:12px}
.storage{margin-top:18px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;font-size:13px;color:var(--sub)}
.bar{height:8px;background:#eef0fb;border-radius:6px;overflow:hidden;margin-top:8px}
.bar i{display:block;height:100%;background:linear-gradient(135deg,var(--c1),var(--c2))}
.view-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.view-head h3{font-size:18px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;max-width:440px}
.panel h4{margin-bottom:14px;font-size:15px}
.panel .fld{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;margin-bottom:12px;font-size:14px}
.panel .btn{margin-top:4px}

/* ===== 弹窗 ===== */
.modal{position:fixed;inset:0;background:rgba(20,24,40,.45);display:none;place-items:center;z-index:50}
.modal.show{display:grid}
.box{background:#fff;border-radius:16px;padding:24px;max-width:380px;width:90%;text-align:center}
.box h3{margin-bottom:10px}
.box p{color:var(--sub);font-size:14px;margin-bottom:16px}
.box .acts{display:flex;gap:10px;justify-content:center}
.codeinput{width:100%;padding:10px;border:1px solid var(--line);border-radius:9px;text-align:center;font-size:16px;letter-spacing:4px;margin:8px 0 14px}

/* ===== 后台工作台 ===== */
.adminwrap{max-width:1000px;margin:0 auto;padding:30px 20px}
.login{display:grid;place-items:center;min-height:80vh}
.login .card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:34px;width:340px;text-align:center;box-shadow:0 10px 40px rgba(91,108,255,.1)}
.login input{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;margin:10px 0;font-size:14px}
.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-top:20px}
.kpi{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}
.kpi h4{font-size:14px;color:var(--sub);margin-bottom:12px;font-weight:600}
.kpi .big{font-size:30px;font-weight:800}
.kpi .split{display:flex;gap:14px;margin-top:10px;font-size:13px;color:var(--sub)}
.kpi .split b{color:var(--text);font-size:16px;display:block}
.bar2{height:10px;background:#eef0fb;border-radius:6px;overflow:hidden;margin:6px 0}
.bar2 i{display:block;height:100%;background:linear-gradient(135deg,var(--c1),var(--c2))}
.seg{font-size:13px;color:var(--sub);margin-top:4px}
.adminbar{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);background:#1f2330;color:#fff;padding:12px 20px;border-radius:10px;font-size:14px;opacity:0;transition:.25s;z-index:99}
.toast.show{opacity:1}

/* ===== 展示页：真实界面预览框 ===== */
.section-title{text-align:center;font-size:26px;font-weight:800;margin:46px 0 6px}
.section-sub{text-align:center;color:var(--sub);margin-bottom:26px}
.mock-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:860px){.mock-grid{grid-template-columns:1fr}}

/* 浏览器预览 */
.browser{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 12px 36px rgba(91,108,255,.12)}
.browser .bar{background:#eef0fb;padding:9px 12px;display:flex;gap:7px;align-items:center}
.browser .bar .d{width:11px;height:11px;border-radius:50%}
.browser .bar .addr{flex:1;background:#fff;border-radius:7px;padding:5px 10px;font-size:11px;color:var(--sub);text-align:center}
.browser .body{padding:14px;min-height:230px;background:linear-gradient(180deg,#fafbff,#fff)}
.browser .nav2{display:flex;align-items:center;gap:8px;margin-bottom:12px}
.browser .nav2 .lg{width:22px;height:22px;border-radius:6px;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;display:grid;place-items:center;font-weight:800;font-size:12px}
.browser .side2{display:flex;gap:6px;margin-bottom:10px}
.browser .side2 span{flex:1;height:8px;border-radius:4px;background:#eef0fb}
.browser .frow{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.browser .frow .fc{background:#f7f8ff;border:1px solid var(--line);border-radius:9px;height:46px;display:grid;place-items:center;font-size:20px}
.browser .up{margin-top:12px;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;text-align:center;padding:9px;border-radius:9px;font-size:12px;font-weight:600}

/* 手机预览 */
.phone{width:210px;margin:0 auto;border:9px solid #1f2330;border-radius:30px;overflow:hidden;background:#fff;box-shadow:0 12px 36px rgba(91,108,255,.18)}
.phone .ph-h{background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;padding:22px 16px 14px}
.phone .ph-h .av{width:42px;height:42px;border-radius:50%;background:rgba(255,255,255,.25);margin-bottom:10px}
.phone .ph-h .bar2{background:rgba(255,255,255,.3)}
.phone .ph-list{padding:10px}
.phone .ph-item{display:flex;align-items:center;gap:10px;padding:9px 6px;border-bottom:1px solid var(--line)}
.phone .ph-item .ic{width:30px;height:30px;border-radius:8px;background:#eef0fb;display:grid;place-items:center}
.phone .ph-item .ln{flex:1;height:7px;border-radius:4px;background:#eef0fb}
.phone .ph-fab{position:relative}
.phone .ph-fab .plus{position:absolute;right:14px;bottom:14px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;display:grid;place-items:center;font-size:24px;box-shadow:0 6px 16px rgba(91,108,255,.4)}
.phone .ph-tabs{display:flex;border-top:1px solid var(--line)}
.phone .ph-tabs div{flex:1;text-align:center;padding:9px 0;font-size:11px;color:var(--sub)}
.phone .ph-tabs div.on{color:var(--c1);font-weight:700}

/* 桌面客户端预览 */
.desktop{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 12px 36px rgba(91,108,255,.12)}
.desktop .tbar{background:linear-gradient(135deg,#3a3f5c,#2a2e44);padding:8px 12px;display:flex;gap:7px;align-items:center}
.desktop .tbar .d{width:10px;height:10px;border-radius:50%}
.desktop .tbar .tt{color:#cfd3e6;font-size:11px;margin-left:6px}
.desktop .dbody{display:grid;grid-template-columns:130px 1fr}
.desktop .dleft{background:#f7f8ff;border-right:1px solid var(--line);padding:12px}
.desktop .dleft .li{height:9px;border-radius:4px;background:#e3e6f7;margin-bottom:9px}
.desktop .dleft .li.on{background:linear-gradient(135deg,var(--c1),var(--c2))}
.desktop .dright{padding:12px}
.desktop .dgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.desktop .dgrid .df{background:#f7f8ff;border:1px solid var(--line);border-radius:8px;height:40px;display:grid;place-items:center;font-size:18px}
.desktop .dtr{margin-top:10px;background:#f7f8ff;border-radius:8px;padding:8px;font-size:10px;color:var(--sub)}

/* 页脚 CTA */
.cta{text-align:center;margin:40px 0;padding:34px;background:linear-gradient(135deg,#eef0ff,#f3ecff);border-radius:18px}
.cta h2{font-size:24px;margin-bottom:10px}
.cta p{color:var(--sub);margin-bottom:18px}

/* 下载页大卡片 */
.dl-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;max-width:760px;margin:0 auto}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px;text-align:center;box-shadow:0 10px 30px rgba(91,108,255,.08)}
.dl-card .big-ic{width:74px;height:74px;border-radius:20px;background:linear-gradient(135deg,var(--c1),var(--c2));color:#fff;display:grid;place-items:center;font-size:34px;margin:0 auto 14px}
.dl-card h3{margin-bottom:6px}
.dl-card p{color:var(--sub);font-size:13px;margin-bottom:18px}
.tag{display:inline-block;background:#eef0fb;color:var(--c1);font-size:12px;padding:3px 10px;border-radius:20px;margin:0 4px}

/* 分享页卡片 */
.share-card{max-width:480px;margin:30px auto;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:30px;text-align:center;box-shadow:0 10px 30px rgba(91,108,255,.1)}

/* ===== 下载任务卡片 ===== */
.tasks{display:grid;gap:14px}
.task{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px}
.task-top{display:flex;justify-content:space-between;align-items:center;font-size:14px;margin-bottom:10px}
.task-top .nm{font-weight:600;word-break:break-all}
.task-top .st{font-size:12px;color:var(--sub);white-space:nowrap;margin-left:10px}
.task .bar{height:9px;background:#eef0fb;border-radius:6px;overflow:hidden;margin:6px 0}
.task .bar i{display:block;height:100%;background:linear-gradient(135deg,var(--c1),var(--c2))}
.share-card .fic{width:80px;height:80px;border-radius:18px;background:linear-gradient(135deg,#eef0ff,#f3ecff);color:var(--c1);display:grid;place-items:center;font-size:38px;margin:0 auto 16px}
.share-card .meta{color:var(--sub);font-size:13px;margin-bottom:18px}

/* ===== 登录/注册页 ===== */
.auth{display:grid;place-items:center;min-height:100vh;background:linear-gradient(160deg,#eef0ff,#f3ecff)}
.auth .acard{background:#fff;border:1px solid var(--line);border-radius:20px;padding:38px 34px;width:380px;box-shadow:0 18px 50px rgba(91,108,255,.16);text-align:center}
.auth .alogo{font-size:24px;font-weight:800;margin-bottom:4px}
.auth .asub{color:var(--sub);font-size:13px;margin-bottom:20px}
.auth .tabs{display:flex;gap:6px;background:#eef0fb;border-radius:11px;padding:5px;margin-bottom:20px}
.auth .tabs button{flex:1;border:none;background:transparent;padding:9px;border-radius:8px;font-size:14px;font-weight:600;color:var(--sub);cursor:pointer}
.auth .tabs button.on{background:#fff;color:var(--c1);box-shadow:0 2px 8px rgba(91,108,255,.12)}
.auth input{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:11px;margin-bottom:12px;font-size:14px}
.auth input:focus{outline:none;border-color:var(--c1)}
.auth .btn{width:100%;justify-content:center;margin-top:4px}
.auth .hint{font-size:12px;color:var(--sub);margin-top:14px}
.auth .err{color:#e5484d;font-size:13px;min-height:18px;margin-bottom:6px}